Equalizing device for brakes



June 4, 1929 1.. TADDEO 1,715,796

EQUALIZING DEVICE FOR BRAKES Filed 001:. '7, 1927 2 Sheets-Sheet l June 4, 1929. L. TADDEO 1,715,796

EQUALIZING DEVICE FOR BRAKES Filed Oct. '7, 1927 2 Sheets-Sheet 2 //vvE/vme 40/67 720050 Patented June 4, 1929.

LUIGI "rannno, 'or' CLEVELAND, onto.-

nava'uzmo nnvrcn son BnAxEs.

Application fiia October 7, 1927. Serial mazzaese.

My invention particularly relates to devices of the characternoted in which. an intel-mediate floating member Comprised of relatively movable parts is adapted to com pensate for orequalize the differential between the various reactive stresses respectively exerted by a plurality of brakingmembers when said members 9 are worn in different amounts or forother reasons react in different degrees to the same braking force. I

The invention is particularly illustrated in the accompanyingdrawings inconnection with a pair of brake devices 'appliedto the rear wheelsof an automobile} i The annexed drawingsancl the'f llowing description set forth in detail-certainmeans illustrating my inventiom'jsuch;disclosedmeans constituting, however, butone, of the various forms in which the principle of -the;

invention may be embodied. I 1 In said annexed 'drawmgs:

Figure 1 is a plan view'of an automobile chassis showing my improved equalizing device applied to the two rear wheel brakes;

Figure 2 is a side elevation of the elements shown in Figure 1;

Figure 3 is a plan view, upon an enlarged scale, of the equalizing device proper, parts being shown in plan section; also showing fragmentary portions of coupling members adapted to connect the equalizing device to the means by which braking action is applied and to the several braking members proper, this view showing the equalizing de-. 0 vice in released position;

Figure 4 is a plan view similar to Figure 3, but showing the position of the several parts of the equalizing device when a braking force is applied thereto and acts upon two brakes in different conditions, one of the brakes, for instance, being worn more than the other;

Figure 5 is a side elevation of the members shown in Figures 3 and 4, taken from the plane indicated by line-55, Figure 3; and

Figures 6 and 7 represent vertical cross sections, taken respectively in the planes indicated by lines 66 and 77, Figures 3 and gt. Referring to the annexed drawings in which the same parts are indicated by the same respective ordinalsin the "different views, a service brake lever 1 of an automobile is rotatably mounted upon the pin 2 and has an upwardly-extended arm 3 connected to a yoke member 4: secured to one end of a bolt 5. vBy the means described, the braking action is applied to my improved equalizing device which is adjustablyconnected to the other end of the bolt 5 by means of a yoke member 6, whose two side members are mounted at their ends upon a pin 7 which intersects the central parts of the side walls 8 and 9 of a housing member forming means for holding together the relatively movable parts of the equalizing device which will now be described. i

The two side faces 8 and 9 of the housing are further secured together adjacent their edges by'rivets 10 and 11 upon which are mounted roller bearings 17, as plainly shown in Figure'QG, thev walls 8 and 9 being formed with respective pairs'tof oppositely-disposed outwardly-projecting ears 29 receiving the rivets 10 and 11.5 The side faces 8 and-9 of 1 the housingare formed with pairs of oppo- 1 sitely-disposed side flanges 12 turned at right angles .to; the faces 8 and 9 proper and forming holding means forthe outer smooth faces ofia pair ,of rack members 13 and H whose rack portions are inwardly-disposed and whose-outerzface portions freelyvslide upon.

the inside faces of the flanges 12, as plainly shown in Figure 4. Upon the central pin 7 is mounted a roller bearing 15 and upon this bearing is mounted a pinion 16 whose side faces lie in planes parallel with the faces 8 and 9 of the housing and which engages the oppositely-disposed racks 13 and 14. These rack members 13 and 14 are provided 'with coupling members 18 and .19 by means of which they may be secured by pins 20 to links21 and 22, Figure 1. The intermediate portions of the outer smooth side faces of the racks 13 and 14' roll .upon'the pair of bearings 17 -mounted upon the rivets 10 and 11. Any dirt, dnst,'or other obstruction, or moisture, which blows in or creeps along the outer smooth end face portions of the racks 13 and 14 and the side flanges =12 escapes from the casing or is worked out therefrom between the cars 29 upon which the roller bearings 17 are mounted. The aforementioned links 21 and 22 are secured respectively to a shaft 23 and'a surrounding shell or bushing member 24 supported upon'the automobile chassis. The shaft 23 through the medium of a link 25 is connectedto the braking device27 of one of the automobile rear wheels and the surrounding sleeve 24 is connected by a link 26 to the braking, device 28 ofthe oppositelydisposed automobile wheel. 1

It will be evident from the aforegoing description and; the accompanying drawings am; if a braking' force is i m a amm- 1, it will pull the. housing 8-9 and the pinion '16 towards the front of the automobile; the

engagement of the pinion 16 with the raek members Band 14 also tending to pull, the

rack members forwardly and toapply the lu akmg devices 27 and 28. These braking deviees'will be moved to an extentinversely proportional to the amountof the reactive stresses setup by the several braki n g devicesl These stresses may vary'for several reasons due to the ditl'erent conditions of'the' two braking devices; for instance. one of; the brakes may be worn more than the other. This differential between the reactive stresses of the severalbraking devices iseompensated for orequahzed'by the relative movements of the two rack members 13 and 14 which. as

i being permitted by the rolling of the pinion Y '16 forwardly relatively to that rack whieh re-.

' 2 siststhe braking action to a greater extent,'.

will be readily understood-will be pulled tors wardly. distances inversely proportionate to these various stresses. the different amounts of movement of the rack members 13 and H resulting in a'forward movement of the other rack to 'an'extent greater than it would have f'been moved by the same braking foreesif both wheel-braking devices had resistedto 30' the'same extent; 'j- What I claim is:

v. 31; A floatingequalizing brake unit; 'coml risin a housm' a in intersectin the side A 3 i a I 1-1 faces tl1ereof;.-aroller bearing mounted upon fpinion' mounted upon said bearg oppositely i disposed rack 1 members engaging saldpimon; two pairs of oppositelydisposed housing ears projected outwardly from the bottom and top walls of said housing; a pan of roller bearings mounted in said ears and engagingthe outside face. portions of said rack members, respectively; a U- shaped coupling member secured to said pin; and eouphng members'secured to 'sa d .raek

members, respectively.

" 2. A floating equalizing bralte unit comprising. a housing: a pin intersecting the side" faees thereof: a roller bearing mounted upon said pin: a pinion mounted upon said hearing: oppositely disposed rack members engaging said pinion, the outside faces of said raek men'ibers being smooth and adapted to slide upon the inner bottom and top surfaces of said housing;

the top and bottom walls of said'housin r: a pair of pins llgldly mounted 1H said pairs of 7 two pairs of oppositely disposed housing ears projected outwardly from ears, respectively; a'pair ,of rollerbearing's mounted upon-said 'Pinvandengaging the-3"" .smooth outside face' po'rtionsof said rack members. respectively a u-sha-ped coupling member secured to said first-mentionedpin';

- and coupling members secured to said rack members," respectively.

Signed by me this 3rd advise October: 1927 

